One- or two-dimensional organometallic arrays containing PdIr2(μ3-S)2 mixed-metal sulfido cluster units connected via the nicotinamide or isonicotinamide ligands on their Pd sites through hydrogen-bonding interactions

Mixed-metal sulfido cluster [(PdCl2)(Cp*Ir)2(μ3-S)2] (Cp*=η5-C5Me5) dissolved in CH2Cl2 reacted with two equivalent of L (L=nicotinamide, isonicotinamide, or N-methylnicotinamide) in the presence of AgBF4 to give the cationic clusters [(PdL2)(Cp*Ir)2(μ3-S)2][BF4]2. The single-crystal X-ray diffraction studies of these products have disclosed that in the solid state the PdIr2S2 cores are self-assembled to form one-dimensional chains through the intermolecular hydrogen-bonding between the amide groups for L=nicotinamide or two-dimensional sheets via the hydrogen-bonding between the amide groups and the BF4 anions for L=isonicotinamide, whereas no organization of the cluster cores is observed for L=N-methylnicotinamide.